From 53c701cc0ebd38db255c1ce694391b38dbb5fe01 Mon Sep 17 00:00:00 2001
From: Rhet Turnbull <rturnbull@gmail.com>
Date: Sat, 8 Jan 2022 17:41:06 -0800
Subject: [PATCH] Added sqlgrep

---
 osxphotos/sqlgrep.py | 55 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 osxphotos/sqlgrep.py

diff --git a/osxphotos/sqlgrep.py b/osxphotos/sqlgrep.py
new file mode 100644
index 00000000..c3ee914b
--- /dev/null
+++ b/osxphotos/sqlgrep.py
@@ -0,0 +1,55 @@
+"""Search through a sqlite database file for a given string"""
+
+import re
+import sqlite3
+from typing import Generator, List
+
+
+def sqlgrep(
+    filename: str,
+    pattern: str,
+    ignore_case: bool = False,
+    print_filename: bool = True,
+    rich_markup: bool = False,
+) -> Generator[List[str], None, None]:
+    """grep through a sqlite database file for a given string
+
+    Args:
+        filename (str): The filename of the sqlite database file
+        pattern (str): The pattern to search for
+        ignore_case (bool, optional): Ignore case when searching. Defaults to False.
+        print_filename (bool, optional): include the filename of the file with table name. Defaults to True.
+        rich_markup (bool, optional): Add rich markup to mark found text in bold. Defaults to False.
+
+    Returns:
+        Generator which yields list of [table, column, row_id, value]
+    """
+    flags = re.IGNORECASE if ignore_case else 0
+    try:
+        with sqlite3.connect(f"file:{filename}?mode=ro", uri=True) as conn:
+            regex = re.compile(r"(" + pattern + r")", flags=flags)
+            filename_header = f"{filename}: " if print_filename else ""
+            conn.row_factory = sqlite3.Row
+            cursor = conn.cursor()
+            cursor.execute("SELECT name FROM sqlite_master WHERE type='table'")
+            for tablerow in cursor.fetchall():
+                table = tablerow[0]
+                cursor.execute("SELECT * FROM {t}".format(t=table))
+                for row_num, row in enumerate(cursor):
+                    for field in row.keys():
+                        field_value = row[field]
+                        if not field_value or type(field_value) == bytes:
+                            # don't search binary blobs
+                            next
+                        field_value = str(field_value)
+                        if re.search(pattern, field_value, flags=flags):
+                            if rich_markup:
+                                field_value = regex.sub(r"[bold]\1[/bold]", field_value)
+                            yield [
+                                f"{filename_header}{table}",
+                                field,
+                                str(row_num),
+                                field_value,
+                            ]
+    except sqlite3.DatabaseError as e:
+        raise sqlite3.DatabaseError(f"{filename}: {e}")